Mode 2 Test

Mode 2

Special Tools Required
MFCS service connector 07WAZ-001010A

Description:

Mode 2 is an easy way to identify a problem circuit without having to test the circuit with a DVOM. Mode 2 will confirm a switch/circuit is working by flashing the ignition key light and sounding the beeper as the circuit is used. The multiplex control system will confirm inputs as they are grounded except for the following circuits:
- Turning the intermittent wiper ring (several confirmations as ring is turned).
- Turning the dash light illumination dimmer (several confirmations as the knob is turned).
- The Audio unit, Navigation display, RES display, DVD player (confirmation as any one component is disconnected).

To Enter Mode 2:




1. From Mode 1, disconnect the special tool from the multiplex control (MPCS) Inspection connector for between 5 and 10 seconds, then reconnect it. The ignition key light should come on and the beeper should beep for 2 seconds, then blink/beep twice more at 0.2 second intervals. This indicates the system has entered Mode 2.

NOTE: To cancel Mode 2, disconnect the special tool from the multiplex control inspection connector for more than 10 seconds or turn the ignition switch OFF.













2. Operate the switches as described in the charts above.

NOTE:
- A second key is necessary to test the key cylinder switches. If only one key is available, cut a second key from a non-immobilizer type key blank for the test.
- When testing the door lock knob switches, make sure all three passenger doors are locked. After unlocking the door, make sure to return the door lock knob switch to the lock position, otherwise the test results will be inaccurate.

Did the multiplex control system confirm all the circuits by flashing the ignition key light and sounding the beeper?

YES - The multiplex system is OK, if the symptom is still present, go to the input test for the system with the problem (see chart), or refer to multiplex control unit input test.

NO - Find the open or short in the circuit that was not confirmed by the multiplex control system. If the circuit is OK, replace the multiplex control unit that monitors the circuit.